Earlier quoted context omitted.
Notably, this happened before any of these events, and to help you with Austrian history, the entire "family" has been since dismissed. (Kneissl is now a blogger in Russia, far from Austria or its politics.)
Russian ties in Austria have been strong for a couple of years and they’re simply coming to light (mentioning this in context of energy trade) Austrian spymaster warns of Russian ties as far right claws back support https://on.ft.com/45UTDUp As well in context of security apparatus cooperation Journalist Who Exposed Russia Spies Flees Vienna on Safety Fears https://www.bloomberg.com/news/articles/2023-02-02/journalis…
This is in historical context rather ridiculous. This is actually related to the Gulf War, and Iraq (yay, the Western ally in the greater region) formerly prominently supplying Austrian demand. With sanctions and then the war, Austria was looking for alternative sources and settled on Russia, which offered long-term guarantees and has thus stepped into the role of the most prominent supplier, since. (I actually do remember the then federal minister stepping in front of TV cameras and declaring supplies secured, thanks to this "historic deal".) In hindsight, this is more a case of out of the frying pan and into the fire. Not that there hadn't been internal and external pressure to do anything about this, but, as infrastructure had developed, there was – and still is – not much of an alternative. Mind that some German natural gas storage is located in Austria and is supplied by the same sources, as well.